TheOneFeatureWeAllKnowAppleWillBeAddingOnTheNextiPad

When the iPad Air and iPad mini with Retina display launched last fall, they came without Touch ID, the fingerprint reader technology Apple brought to the iPhone 5s just weeks before. That oversight is almost certainly going to be corrected later this year when next-generation iPads are announced, according to iDownloadBlog.
Apple hasn’t officially confirmed that Touch ID is coming to the company’s line of tablets. Nonetheless, the clues are there.
As UNiCORN recently announced on Twitter, Touch ID’s resources in Xcode clearly show the feature is coming to iPads.

Additionally, mentions of Touch ID for both the iPhone and iPad have been spotted in strings for a BiometricKit framework that first appeared in the iOS 7 Beta 4 SDK files.
As iDownloadBlog notes:

A text string accompanying the ‘BiometricKitUI.axbundle’ folder describes an image showing a person “holding an iPhone with their right hand while touching the Home button with their thumb.”
BiometricKit was later removed from the iOS 7 Beta 5 SDK, though smaller traces of it did appear in subsequent SDK releases.